I live in the suburban areas outside Southend
I have two sheds one 4m*2m and one 2m*1.5, both are in regular but infrequent use, perhaps one or two times for a few minutes each week.
Last year robins nested in a tool box in the larger shed and successfully raised a chick, which we watched fly away. Even when I went into the shed I went in slowly, and sometimes the male would just sit an watch me come and go.
This year there was a problem in the small shed and I had to remove a wall and refurbish it, once it was fixed I found two abandoned nests, where the parents must have got in while I was rebuilding and not been able to do so once I had finished. in the nests were five oval cream coloured eggs about the size of a small grape. Big shame
The reason for the post is that I would like to build bird boxes where the robins and whatever this year's were could nest safely, so that last years triumph could be repeated and this years disappointment could be avoided. I do not have the faintest idea how, and I guess it is too late for this year, but I would like to be ready for next year.
Apart from not using the sheds at all I am prepared to put quite a bit of time and effort into it.
Also bats are frequent visitors, anything I can do to encourage them?